Influence of Nitrogen levels and Row Spacing on Seed Yield and Uptake of Major Nutrients in Roselle (Hibiscus sabdariffa L. var. Sabdariffa)

A field trial was carried out to determine the effect of different levels of nitrogen (50, 100, 150, 200 and 250 kg/ha.) and row spacings (75, 100 and 120 cm) on seed yield and uptake of major nutrients in roselle. The study revealed that although the application of nitrogen at 250 kg per hectare influenced most of the growth and yield parameters and nutrients uptake significantly, the maximum seed yield was obtained at 200 kg N per hectare. The different row spacings also influenced some of the growth and yield parameters and the uptake of nutrients. The seed yield and the uptake of nutrients were significantly highest at the closest row spacing of 75 cm.